What is the recommended approach to server roles to minimize risk?

What is the recommended approach to server roles to minimize risk?

• A. Run multiple primary functions on a single server to save hardware costs.
• B. Create dedicated servers for each function, such as web, database, and DNS.
• C. Implement only one primary function per server to prevent functions that require different security levels from co-existing on the same server.
• D. Use virtualization to combine functions on a single virtual component.

Answer: (C)

Separating server roles to limit what each machine handles is the best way to reduce risk. When a server runs only one primary function, you can apply security controls, patching cadences, and access permissions that are tightly matched to that specific role. This confines the potential damage if that function is ever compromised and makes it much easier to detect, isolate, and respond to issues. Implementing only one primary function per server is the clearest way to prevent different functions with different security requirements from coexisting on the same host. For example, a web server and a database server have very different risk profiles, data access needs, and patching needs. Keeping them on separate servers means a vulnerability in the web layer cannot automatically expose the database layer, and each server can be hardened and monitored for its particular role. While dedicating servers for each function achieves similar isolation, the emphasis here is on the strict boundary: avoid mixing multiple primary functions on one server. Using virtualization to combine functions on a single VM reintroduces the possibility that a compromise in one function affects others, unless very careful segmentation is maintained, which is more complex and error-prone.

Separating server roles to limit what each machine handles is the best way to reduce risk. When a server runs only one primary function, you can apply security controls, patching cadences, and access permissions that are tightly matched to that specific role. This confines the potential damage if that function is ever compromised and makes it much easier to detect, isolate, and respond to issues.

Implementing only one primary function per server is the clearest way to prevent different functions with different security requirements from coexisting on the same host. For example, a web server and a database server have very different risk profiles, data access needs, and patching needs. Keeping them on separate servers means a vulnerability in the web layer cannot automatically expose the database layer, and each server can be hardened and monitored for its particular role.

While dedicating servers for each function achieves similar isolation, the emphasis here is on the strict boundary: avoid mixing multiple primary functions on one server. Using virtualization to combine functions on a single VM reintroduces the possibility that a compromise in one function affects others, unless very careful segmentation is maintained, which is more complex and error-prone.